Japan Geoscience Union Meeting 2016

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Oral

Symbol A (Atmospheric and Hydrospheric Sciences) » A-HW Hydrology & Water Environment

[A-HW19] Water Environment and Geology in Urban Areas

Wed. May 25, 2016 1:45 PM - 3:15 PM 202 (2F)

Convener:*Takeshi Hayashi(Faculty of Education and Human Studies, Akita University), Hiroaki SUZUKI(Strategic Technology Development Dept. Research & Development Center, Nippon Koei Co., Ltd.), Kei Nishida(Interdisciplinary Centre for River Basin Environment, Interdisciplinary Graduate School, University of Yamanashi), Motoyuki Asada(Shimizu Corporation), Satoshi Takizawa(Department of Urban Engineering, Graduate School of Engineering, the University of Tokyo), Masaya Yasuhara(Rissho Univ.), Chair:Masaya Yasuhara(Rissho Univ.), Satoshi Takizawa(Department of Urban Engineering, Graduate School of Engineering, the University of Tokyo), Kei Nishida(Interdisciplinary Centre for River Basin Environment, Interdisciplinary Graduate School, University of Yamanashi)

3:00 PM - 3:15 PM

[AHW19-06] Precise measurement of river cross-section using photogrammetry for discharge observation

*Yu Tabayashi1 (1.University of Tsukuba)

Keywords:Photogrammetry, River cross-section, Discharge

River discharge data can be calculated by multiplying river cross-section area and flow rate. As gaining precise river cross-section area is difficult, river discharge data often include some errors. Photogrammetry is a method to gain a precise shape of objects but it was hard for non-expert to master. Thank to the improved technology of digital photo, computer and computer software, we non-expert nowadays have chance to apply this technology to multiple fields. In this study, I used photogrammetry technology to acquire river cross-section data at Kosakuragawa River, foot of Mt. Tsukuba. The data matched with the data I gained with tape measure. By using photogrammetry, it is expected that we could gain much precise river cross-section data as we could gain continuous data of riverbed. When the light condition and water clarity is fine, we could apply this method and improve accuracy of discharge data.